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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 269 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.117 × 4 =
  2. 2.89 × 4 =
  3. 3.38 × 4 =
  4. 4.124 × 4 =
  5. 5.45 × 4 =
  6. 6.70 × 8 =
  7. 7.54 × 4 =
  8. 8.17 × 4 =
  9. 9.41 × 8 =
  10. 10.34 × 8 =
  11. 11.33 × 4 =
  12. 12.120 × 4 =
  13. 13.158 × 4 =
  14. 14.68 × 8 =
  15. 15.15 × 8 =
  16. 16.54 × 8 =
  17. 17.56 × 4 =
  18. 18.53 × 8 =
  19. 19.65 × 8 =
  20. 20.24 × 4 =
  21. 21.81 × 4 =
  22. 22.28 × 4 =
  23. 23.74 × 8 =
  24. 24.29 × 8 =
  25. 25.24 × 8 =
  26. 26.135 × 4 =
  27. 27.109 × 4 =
  28. 28.30 × 4 =
  29. 29.17 × 4 =
  30. 30.14 × 4 =
  31. 31.42 × 8 =
  32. 32.90 × 4 =
  33. 33.29 × 4 =
  34. 34.40 × 4 =
  35. 35.14 × 8 =
  36. 36.81 × 4 =
  37. 37.55 × 8 =
  38. 38.50 × 8 =
  39. 39.54 × 8 =
  40. 40.76 × 4 =

Answer key

  1. 468
  2. 356
  3. 152
  4. 496
  5. 180
  6. 560
  7. 216
  8. 68
  9. 328
  10. 272
  11. 132
  12. 480
  13. 632
  14. 544
  15. 120
  16. 432
  17. 224
  18. 424
  19. 520
  20. 96
  21. 324
  22. 112
  23. 592
  24. 232
  25. 192
  26. 540
  27. 436
  28. 120
  29. 68
  30. 56
  31. 336
  32. 360
  33. 116
  34. 160
  35. 112
  36. 324
  37. 440
  38. 400
  39. 432
  40. 304

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